Narrated from Jabir from Abi Abdillah Imam Baqir (as):
"I asked Imam Baqir (as) about the Baatin (inner or secret meaning) of this verse,
"And he caused rain to descend on you from sky, to clean you with it and to remove from you the uncleanness of Satan, to strengthen your hearts, and to establish your feet firmly." [8:11]
Imam (as) said, "The sky in the Baatin (inner or secret meaning) is the Prophet (saww), and the rain is Ali (as) and Allah made Imam Ali (as) from the Prophet (saww) and that is the saying of Allah, "(descended) the rain to clean you with it" and that is Ali (as), Allah purifies the hearts of those who Love Him. And regarding the saying of Allah, "And to remove from you the uncleanness of Satan", The one who loves Ali (as), the uncleanness is removed from him and his heart is strengthened. And the saying of Allah, "And to strengthen your hearts and establish your feet firmly", verily that is Ali (as), the one who loves Ali (as), Allah strengthens his heart through Ali (as) and establishes him upon His Wilayat."
[Source: Tafseer al-Ayyashi, Vol. 2, Pg. 50, Hadees. 25 & Tafseer-e-Furat, Pg. 153, Hadees. 190]
"I asked Imam Baqir (as) about the Baatin (inner or secret meaning) of this verse,
"And he caused rain to descend on you from sky, to clean you with it and to remove from you the uncleanness of Satan, to strengthen your hearts, and to establish your feet firmly." [8:11]
Imam (as) said, "The sky in the Baatin (inner or secret meaning) is the Prophet (saww), and the rain is Ali (as) and Allah made Imam Ali (as) from the Prophet (saww) and that is the saying of Allah, "(descended) the rain to clean you with it" and that is Ali (as), Allah purifies the hearts of those who Love Him. And regarding the saying of Allah, "And to remove from you the uncleanness of Satan", The one who loves Ali (as), the uncleanness is removed from him and his heart is strengthened. And the saying of Allah, "And to strengthen your hearts and establish your feet firmly", verily that is Ali (as), the one who loves Ali (as), Allah strengthens his heart through Ali (as) and establishes him upon His Wilayat."
[Source: Tafseer al-Ayyashi, Vol. 2, Pg. 50, Hadees. 25 & Tafseer-e-Furat, Pg. 153, Hadees. 190]